Submission

Score: 50

User: sakuragichan

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2026-09-05 22:38:02

#include <iostream>
using namespace std;

int main() {
    int n ,n1 = 1 ,n2 = 1 , x = 0;
    cin >> n;
    if (n == 1 || n == 2) {
        cout << 1 << endl;
        return 0;
    }
    for (int i = 1; i <=n-2; i++) {
        x = n1;
        n1 += n2;
        n2 = x;
    }
    cout << n1 << endl;
    return 0;
}